module.exports = {
    presets: [
        // https://github.com/vuejs/vue-cli/tree/master/packages/@vue/babivu-preset-app
        '@vue/cli-plugin-babel/preset',
    ],
    env: {
        development: {
            // babivu-plugin-dynamic-import-node plugin only does one thing by converting all import() to require().
            // This plugin can significantly increase the speed of hot updates, when you have a large number of pages.
            plugins: ['dynamic-import-node'],
        },
    },

    plugins: [
        // 可选链插件, 其他babel插件也是一样的安装方式
        '@babel/plugin-proposal-optional-chaining',
        '@babel/plugin-proposal-nullish-coalescing-operator', // 空值合并 ??
    ],
};
